SATO /gt Series Programmer's Reference Manual page 130

Unit 4: Standard Command Codes
AUDIBLE BUZZER (ENABLE/DISABLE)
FUNCTION Activates the integrated printer buzzer.
FORMAT
<ESC>IU
Place anywhere between <ESC>A and <ESC>Z.
EXAMPLE
<ESC>A
<ESC>IU0
<ESC>Z
OUTPUT
This command does not result in printer output.
NOTES
The duration range is from 175ms to 400ms with increments of 5ms between each of
the consecutive sounds.
Analysis of the receive data is suspended during the sounding of the buzzer.
In multi buffer operation, timing of the buzzer may not be in exact timing with the item
currently printing. To synchronize the two, obtain the printer status and create this
command.
SATO E+ Programming Reference
a = Tone Specification (0 to 4)
0: One short sound
1: One prolonged sound
2: Two consecutively short sounds
3: Two consecutively prolonged sounds
4: Three consecutively prolonged sounds.
PN 9001149A Page 4-88